Article Figures & Data

Figures

Montmorillonite coating detrital grains in a Miocene arkose, Madrid Basin, Spain. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=118]).

SEM of fibrous illite, critical point-dried from methanol, Rotliegend Sandstone, North Sea. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=91]).

SEMs showing (a) authigenic pore-filling illite from the Magnus Sandstone, North Sea which is (b) anchored in a later quartz overgrowth. Samples were prepared from preserved core after critical point drying and yielded XRD patterns characteristic of I/S (McHardy et al., 1982).

Network of platy authigenic illite from sandstone with incipient lath-like or fibrous forms growing from the peripheries of the platy particles. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=93]).

Internal structure of glauconite grain from the Isle of Wight showing honeycomb “smectitic” texture. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=81]).

Fe-rich chlorite, Spiro Sandstone, Arkoma Basin, Oklahoma, USA, showing well developed crystalline form and interlocking edge-to-face contacts. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=72]).

Aggregate of Mg-rich chlorite, Rotliegend sandstone, Northern Germany, showing less well developed crystalline form than Fe-rich chlorite, and with an abundance of edge-to-face, face-to-face and edge-to-edge contacts, as well as a relatively open, porous structure. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=71]).

Corrensite (R1 ordered mixed-layer trioctahedral chlorite-trioctahedral smectite) from the Yates Formation sandstone showing well developed cellular structure similar to that of smectite. (Image reproduced from the ‘Images of Clay Archive’ of the Mineralogical Society of Great Britain & Ireland and The Clay Minerals Society [http://www.minersoc.org/photo.php?id=75]).